.readerControls{
    position: fixed;
    left: 50%;
    bottom: 40px;
    margin-left: 548px;
    z-index: 2;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100px;

}
/* 
.readerControlBtn{
    box-shadow: 0 0 20px 0 rgba(0, 0, 0, 1);
}

.normal .readerControlBtn {
    background-color: #fff;
    color: #000;
}

.night .readerControlBtn{
    background-color: #27282A;
    color: #848486;
}

.green .readerControlBtn{
    background-color: #C7EDCC;
    color: #000;
} */